.dropdown {
    min-width: 100px;
    position: relative;
  }
  .dropdown .btn {
    width: 100%;
    display: block;
    color: #fff;
    background: #2d8cf0;
    border: #2d8cf0;
    padding: 6px 10px;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    margin: 0;
  }
  .dropdown-menu {
    min-width: 100px;
    margin: 0;
    padding: 0;
    background: #fff;
    box-shadow: 0 0 10px #ccc;
    margin-top: 10px;
    position: absolute;

  }
  .fade-enter-active, .fade-leave-active {
    transition: opacity 1s
  }
  .fade-enter, .fade-leave-to  {
      opacity: 0
  }